9 Pre-Start Up Check List
The following items need to be performed before attempting to start up a Level Plus DDA
Monitor system.
1. Install the Level Plus Monitor enclosure. See the Monitor Installation and Electrical
Terminations section of this manual for installation information.
2. Install the DDA tank gauges in the tanks to be monitored. DDA tank gauge installa-
tion information is provided in section 5 of this manual. Additional tank gauge specif-
ic installation information can be found in the MTS DDA Tank Gauge Operation and
Installation manual provided with the tank gauges (MTS #550164). Install Side Tank
Indicators, if desired. Refer to Side Tank Indicator Installation and Operation manual
(MTS P/N 550436).
3. Complete all field wiring requirements as defined in section 5 of this manual and sec-
tion 6 of the Tank Gauge Manual (MTS #550164). If Side Tank Indicators are installed,
refer to the Field Wiring Installation section of the STI manual (MTS P/N 550436).
Ensure that all installation drawing notes and requirements have been completed.
4. If the Level Plus system is installed in a hazardous area, double check to insure that
all hazardous area requirements have been completed.
5. Program each DDA tank gauge communication address switch (located inside the tank
gauge housing) with the proper communication address and checksum mode. The
DDA ‘tank gauge checksum’ switch and the ‘communication time-out timer’ switch
must be ON (enabled) and the DDA tank gauge power override switch must be OFF
(disabled). The Level Plus monitor system only supports a fixed tank gauge address-
ing scheme. The system will always poll the DDA tank gauge addressed at C0 hex
(192 decimal) for Tank #1 (channel #1 ), C1 hex (193 decimal) for Tank #2, C2 hex
for Tank #3 and so on. This fixed addressing scheme must be considered before
attempting to program the Level Plus monitor. Additional information about setting the
DDA tank gauge address switch can be found in the programming section of this
manual and in the MTS DDA Tank Gauge Operation and Installation manual provided
with the tank gauges (MTS #550164).
6. Program each STI module communication address switch (located inside the module
housing) with the proper communication address and checksum mode. The STI mod-
ule checksum switch must be ON (enabled) and the STI module power override
switch must be OFF (disabled). The Level Plus monitor system only supports a fixed
STI addressing scheme. The system will always poll the STI addressed at 80 hex (128
decimal) for Tank #1 (channel #1), 81 hex (129 decimal) for Tank #2, 82 hex for Tank
#3 and so on. This fixed addressing scheme must be considered before attempting to
program the Level Plus monitor. Additional information about setting the STI module
address switch can be found in the programming section of this manual and in the
MTS STI Operation and Installation manual provided with the STI modules.
7. Proceed to the programming section of this manual to perform any applicable pro-
gramming requirements for the intended application. The Level Plus monitor defaults
to scanning only level for one DDA tank gauge at address C0 hex. If additional tank
gauges are connected to the system, the user must program the monitor to scan the
additional gauges and enable other functions as desired (i.e. temperature, alarms, vol-
ume calculations, external communications, etc.).
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